PT-2018-13253 · Xkbcommon+5 · Xkbcommon+5

CVE-2018-15864 · Published 2018-08-09 · Updated 2024-01-05

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions xkbcommon versions prior to 0.8.2

Description The issue allows local attackers to crash the xkbcommon parser by supplying a crafted keymap file. This is due to unchecked NULL pointer usage in resolve keysym in xkbcomp/parser.y, which can lead to a NULL pointer dereference when attempting to access a map that was never created.

Recommendations For versions prior to 0.8.2, update to version 0.8.2 or later to resolve the issue. As a temporary workaround, consider restricting access to the xkbcommon parser to minimize the risk of exploitation.

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2018-2114

CESA-2019_2079

CVE-2018-15864

MGASA-2018-0369

OPENSUSE-SU-2018_3802-1

RHSA-2019:2079

RHSA-2019_2079

SUSE-SU-2018:3685-1

SUSE-SU-2024:0037-1

USN-3786-1

USN-3786-2

Affected Products

Alt Linux

Centos

Red Hat

Suse

Ubuntu

Xkbcommon

References · 48

• https://github.com/xkbcommon/libxkbcommon/commit/a8ea7a1d3daa7bdcb877615ae0a252c189153bd2 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2018-15864 · Security Note
• https://ubuntu.com/security/CVE-2018-15857 · Vendor Advisory
• https://security.gentoo.org/glsa/201810-05 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-15859 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2019-2079.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-15861 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2018-0369 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-15864 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-15864 · Vendor Advisory
• https://usn.ubuntu.com/3786-1 · Vendor Advisory
• https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html · Patch
• https://ubuntu.com/security/CVE-2018-15856 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-15864 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-15853 · Vendor Advisory